.nav {
    display: flex;
    padding: 5px;
    background-color: #000;
    color: #fff;
    font-size: 16px;
  }
  .nav_ul {
    margin-left: 5vw;
    display: flex;
    width: 100%;
    flex-direction: row;
  }
  .nav_left {
    padding: 5px 4vw 5px 3vw;
    border-right: 1px solid #2d8cf0;
    cursor: pointer;
  }
  .nav_left:hover,.nav_right:hover{
    color: #2d8cf0;;
  }
  .nav_right {
    display: flex;
    flex: 1;
  }
  .nav_ul li {
    display: flex;
    flex: 5;
    padding: 5px;
  }